Honestly, I don't know. Were you a head TA for at least one year? Are you doing substantial duties of a 4131? For example, I am a supervisor to masters student, I supervise TAs, I am part of the TA recruiting process, interviews, etc, I help out in recruitment of new students and retention of students, etc. If it was easy to believe people based on resume, then we would all be in Canada by now. The list of your duties has to come from someone higher up, thats what I feel.
You also have to decide whether you are okay with applying and the risk of getting denied. I am okay with it and I am also expecting to be denied for now but given what I know now, I would still apply if I had to do it again.